If you need a crossover pipe, I have ones for sale. I might also have a couple of original hangers if interested. One can be seen from the engine bay, and one a bit from the rear.
You see the long-style muffler on ebay now and then. Local muffler shops will not have them anywhere near the proper length.
I got my pipes NORS out of Michigan, IIRC, but can not find a receipt. A local shop should be able to bend ones for you.
Post a question, and you will get some suggestions.